arch/powerpc/platforms/pseries/eeh_sysfs.c

   1 /*
   2  * Sysfs entries for PCI Error Recovery for PAPR-compliant platform.
   3  * Copyright IBM Corporation 2007
   4  * Copyright Linas Vepstas <linas@austin.ibm.com> 2007
   5  *
   6  * All rights reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  16  * NON INFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * Send comments and feedback to Linas Vepstas <linas@austin.ibm.com>
  24  */
  25 #include <linux/pci.h>
  26 #include <linux/stat.h>
  27 #include <asm/ppc-pci.h>
  28 #include <asm/pci-bridge.h>
  29
  30 /**
  31  * EEH_SHOW_ATTR -- create sysfs entry for eeh statistic
  32  * @_name: name of file in sysfs directory
  33  * @_memb: name of member in struct pci_dn to access
  34  * @_format: printf format for display
  35  *
  36  * All of the attributes look very similar, so just
  37  * auto-gen a cut-n-paste routine to display them.
  38  */
  39 #define EEH_SHOW_ATTR(_name,_memb,_format)               \
  40 static ssize_t eeh_show_##_name(struct device *dev,      \
  41                 struct device_attribute *attr, char *buf)          \
  42 {                                                        \
  43         struct pci_dev *pdev = to_pci_dev(dev);               \
  44         struct device_node *dn = pci_device_to_OF_node(pdev); \
  45         struct pci_dn *pdn;                                   \
  46                                                               \
  47         if (!dn || PCI_DN(dn) == NULL)                        \
  48                 return 0;                                          \
  49                                                               \
  50         pdn = PCI_DN(dn);                                     \
  51         return sprintf(buf, _format "\n", pdn->_memb);        \
  52 }                                                        \
  53 static DEVICE_ATTR(_name, S_IRUGO, eeh_show_##_name, NULL);
  54
  55
  56 EEH_SHOW_ATTR(eeh_mode, eeh_mode, "0x%x");
  57 EEH_SHOW_ATTR(eeh_config_addr, eeh_config_addr, "0x%x");
  58 EEH_SHOW_ATTR(eeh_pe_config_addr, eeh_pe_config_addr, "0x%x");
  59 EEH_SHOW_ATTR(eeh_check_count, eeh_check_count, "%d");
  60 EEH_SHOW_ATTR(eeh_freeze_count, eeh_freeze_count, "%d");
  61 EEH_SHOW_ATTR(eeh_false_positives, eeh_false_positives, "%d");
  62
  63 void eeh_sysfs_add_device(struct pci_dev *pdev)
  64 {
  65         int rc=0;
  66
  67         rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
  68         rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);
  69         rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
  70         rc += device_create_file(&pdev->dev, &dev_attr_eeh_check_count);
  71         rc += device_create_file(&pdev->dev, &dev_attr_eeh_false_positives);
  72         rc += device_create_file(&pdev->dev, &dev_attr_eeh_freeze_count);
  73
  74         if (rc)
  75                 printk(KERN_WARNING "EEH: Unable to create sysfs entries\n");
  76 }
  77
  78 void eeh_sysfs_remove_device(struct pci_dev *pdev)
  79 {
  80         device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
  81         device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
  82         device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
  83         device_remove_file(&pdev->dev, &dev_attr_eeh_check_count);
  84         device_remove_file(&pdev->dev, &dev_attr_eeh_false_positives);
  85         device_remove_file(&pdev->dev, &dev_attr_eeh_freeze_count);
  86 }
  87